Fluorine gaspurity of its products, anti-corrosion chromatography, in the blank.
对其产品氟气纯度的防腐色谱分析，处于空白。
2
If the protective seal is not air proof or poor gaspurity, it will also bring welding quality problems.
气路有密封不好的问题，或气体纯度不高，也会引起焊接质量问题。
3
Many factors which may affect the catalytic behavior such as rare earth metal species, calcination temperature, reaction temperature, space speed and feed gaspurity were studied.